7220 datasheet(64/303 Pages) RENESAS

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7220 Group User’s Manual

FUNCTIONAL DESCRIPTION

2.6 Timers

Contents

Timer 1 (TM1)

Timer 2 (TM2)

Timer 3 (TM3)

Timer 4 (TM4)

Timer 12 mode register (T12M)

Timer 34 mode register (T34M)

Table 2.6.1 Memory map of timer-related registers

Addresses

00F016

00F116

00F216

00F316

00F416

00F516

b7 b6 b5 b4 b3 b2 b1 b0

Timer 34 mode register (T34M) [Address 00F516]

After reset RW

Timer 34 Mode Register

6,7

Name

Functions

Timer 3 count source

selection bit (T34M0)

0: f(XIN)/16

1: External clock

Timer 4 internal count

source selection bit

(T34M1)

0: Timer 3 overflow

1: f(XIN)/16

Timer 3 count

stop bit (T34M2)

0: Count start

1: Count stop

Timer 4 count stop

bit (T34M3)

0: Count start

1: Count stop

Nothing is assigned. These bits are write disable

bits. When these bits are read out, the values are

“0.”

Timer 4 count source

selection bit (T34M4)

0: Internal clock

1: f(XIN)/2

Timer 3 external count

source selection bit (T34M5)

0: External clock from P2 3/TIM3 pin

1: External clock from H SYNC pin

R—

Fig. 2.6.4 Timer 34 mode register (address 00F516)

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